CVE-2026-108716: Cleartext Transmission of Sensitive Information in punkpeye mcp-remote
Description
CVE-2026-108716 affects punkpeye mcp-remote versions 0.8.0 through 0.14.3 and involves cleartext transmission of sensitive information. The vulnerability occurs in the authorizeWithDeviceCode function, which sends client secrets and receives tokens without enforcing HTTPS. If device authorization and token endpoints use non-loopback HTTP URLs, attackers on the network path can intercept client secrets and access/refresh tokens. This vulnerability has a medium severity score of 6. No patch or remediation information is provided in the available data.
CVSS v4.0
Score 6.0medium
Affected software
punkpeye
mcp-remote
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in punkpeye mcp-remote (versions 0.8.0 to 0.14.3) arises from the authorizeWithDeviceCode function transmitting sensitive data such as client secrets and tokens over non-HTTPS endpoints. When device authorization and token endpoints are configured as non-loopback HTTP URLs, this allows on-path attackers to capture these sensitive credentials. This cleartext transmission flaw compromises confidentiality of authentication credentials and tokens.
Potential Impact
An attacker positioned on the network path can intercept client secrets and issued access and refresh tokens if the affected versions of mcp-remote communicate with non-loopback HTTP endpoints. This exposure can lead to unauthorized access to protected resources using stolen tokens. The vulnerability does not require privileges or user interaction but does require the attacker to be on-path. The CVSS 4.0 score of 6 indicates a medium severity impact primarily due to the confidentiality breach.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, ensure that device authorization and token endpoints enforce HTTPS and do not use non-loopback HTTP URLs to prevent interception of sensitive data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-11T01:51:49.626Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6acb85be2cdf04f656d09a08
Added to database: 10/11/2026, 12:49:02 UTC
Last enriched: 10/11/2026, 13:18:59 UTC
Last updated: 10/11/2026, 21:33:19 UTC
Views: 12
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